Solar 2021

Solar Advancements Track: Solar Novelty/Safety

Every successful solar advancement of the future begins as an early research effort. The research and development efforts discussed in this session are focused on environmental health and safety (e.g., impact of solar projects on watersheds), energy production efficiency (e.g., controlled etching and nano-structured coatings) and diversified energy storage (e.g., hydrogen/ammonia fuel cells). One of the research efforts presented is about some key advantages (e.g., higher open circuit voltage) of perovskite quantum dots (PQDs) over their thin film counterparts.

Date

Aug 04 2021

Time

4:00 pm - 5:30 pm

Location

Aspen Room East

Speakers

  • Brian Ross_
    Great Plains Institute

    Brian Ross, AICP, LEED Green Associate, joined the Great Plains Institute in 2015 and is a senior program director. Brian joined the institute after 20 years as a consultant working on sustainable development in local decision-making and implementation. He leads the institute’s work on solar energy market transformation and manages technical and policy programs to help local, regional, and state governments and institutions meet climate and renewable energy goals. Brian currently works with local and regional governments developing community standards for utilizing local solar and wind energy resources. He also manages stakeholder engagement and technical committee facilitation for the MN Solar Pathways project, a three-year initiative to model solar deployment strategies to achieve a high-level renewable energy future. He has provided expert testimony on energy regulation, including cost of service and rate design, energy efficiency and renewable development, fuel cost reconciliations, and integrated resource planning.
    Presentation Title: Large-scale Solar Development: Water Quality Risk, or Green Infrastructure? The PV-SMaRT project

    Presentation Description: Large-scale PV solar projects present unique and uncertain risks and opportunities to water quality and watershed functions. The DOE-funded Photovoltaic Stormwater Management Research and Testing (PV-SMaRT) project to evaluate water quality impacts of large-scale solar development. The study will create solar-specific runoff co-efficients that consider type of ground cover, soil type, hydrology, slope, and solar array design based on field testing across the nation and 3-D modeling.

  • Brian Wieliczka
    National Renewable Energy Laboratory

    Brian Wieliczka is a postdoctoral researcher at NREL studying perovskite quantum dots under the guidance of Joey Luther. He obtained a BA in chemistry from St. Olaf College before beginning his PhD at Washington University in St. Louis where he developed the first synthesis of CdSe/PbS core/shell nanocrystals and used optical spectroscopies and charge carrier calculations to characterize the nanocrystals’ optoelectronic properties.

    While a graduate student, he led the investment of ~$25,000 in energy efficiency initiatives at the Catholic Student Center, resulting in an annual savings of $18,500, a nearly 33% reduction in utility bills and carbon dioxide emissions.
    Presentation Title: Identification of Pathways to Optimize VOC for High Voltage Perovskite QD Photovoltaics

    Presentation Description: The development of inexpensive photovoltaic power is integral to the energy mix required to achieve carbon neutrality. Perovskite quantum dots hold many advantages over their bulk counterparts, but have lagged behind in overall performance. In particular, they have achieved particularly high open circuit voltages compared to their thermodynamic limit, which is important for the development of single junction and tandem solar cells. Here, we identify the losses in perovskite quantum dot solar cells and identify pathways to further improve the open circuit voltage for solar energy conversion.

  • David Ginley
    NREL

    Dr. David S. Ginley is currently Chief Scientist for Materials and Chemistry Science and Technology and a Research Fellow at the National Renewable Energy Laboratory. He received his PhD in Inorganic Chemistry from MIT and his BS in Chemistry from the Colorado School of Mines. He directed the Solar Energy Center for India and the US (SERIIUS) and is chief experimentalist for the EFRC Center for Next Generation Materials by Design. Current work focuses on advancing solar and geothermal energy conversion and storage specifically in the areas of development and application of new materials by computational materials design in the areas of transparent conducting oxides, organic electronics materials, nano-materials and the development of process technology for materials and device development including; combinatorial methods, direct write materials, composite materials and non-vacuum processing for materials in extreme environments. A key focus is looking at how to significantly reduce the cost of renewable generated energy through novel devices and processing. He has over 400 publications and 40 patents.
    Presentation Title: Hybrid Thermochemical/Electrochemical Fuel Cycles

    Presentation Description: Hydrogen and Ammonia represent critical chemicals in new paradigms for sustainable energy. We investigate new ways using renewable heat sources coupled with renewable electrons to generate these critical energy materials. This points the way for much larger impact of solar fuels in a sustainable economy.

  • O-Bong Yang
    Jeonbuk National University

    Professor O-Bong Yang is a Professor in the School of Chemical Engineering, Jeonbuk National University, Korea. He has extensive experience in electrochemistry, renewable energy sources, solar cells, and new generation inorganic-organic solar cells. He has been promising researcher and visited several universities as visiting professor/invited speaker worldwide. At present, he is the chairman of Photovoltaic:AI Integrated Graduate School at Jeonbuk National University, Korea. He is an active executive member of various renowned scientific committees such as KiChE, General Chair of Global Photovoltaic Conference (GPVC), and Member of Korea Photovoltaic Society.
    Presentation Title: Improved Optical and Photovoltaic Properties of Crystalline Silicon Solar Cells using Nanowires Textured Silicon

    Presentation Description: This work reports on a low cost and effective method to achieve well-defined and aligned wires like structures on silicon wafer via controlled etching process. The grown SiNWs display the minimum average reflectance of ~2.25% in the wavelength range from 400-1000 nm. Importantly, fabricated solar cell without AR layer, the high conversion efficiency of ~15.9% observed when the average length of SiNWs and reflectance were ~2.52 m and ~2.25%, respectively which is very comparable with commercial solar cell. Thus, the low-cost nanotexturing on Si wafer via controlled etching process would be promising for reducing the cost of solar cells.

  • Qiuming Yu
    Cornell University

    Qiuming Yu is a professor in the Smith School of Chemical and Biomolecular Engineering at Cornell University. She received her Ph.D. in Chemical Engineering from Cornell University and was a postdoctoral fellow in the Micro-devices Laboratory at the NASA Jet Propulsion Laboratory, California Institute of Technology. After spending three years as a research assistant professor in Chemical Engineering at Kansas State University, she moved to the University of Washington and was a full professor in Chemical Engineering before she joined Cornell University in 2020. Her research focuses on plasmonic nanostructures and semiconductor nanomaterials for solar cells, photodetectors and biosensors.
    Presentation Title: Lead-Free Perovskites for Stable and Highly Efficient Solar Cells

    Presentation Description: Perovskite solar cells (PVSCs) have progressed rapidly in recent years. The most efficient PVSCs are using lead-based perovskites, which raises some concerns for commercialization because of the potential environmental contamination and human health problems. Therefore, it is important to carefully find an environmentally benign and efficient replacement for lead with a focus on keeping the excellent properties ascribed to its presence in perovskite compounds. Our study demonstrates the benefit of tuning cation sizes and introducing divalent cations to integrate stabilizing factors into pure tin perovskites, creating new routes for efficient and stable lead-free perovskite solar cells.

  • V. Vinay K. Doddapaneni
    Oregon State University

    Vinay is an International graduate student at OSU from India. He is working under the supervision of Dr. Chih-Hung Chang. As a Ph.D. student, his focus is on developing inks for additive manufacturing, material synthesis, and characterization.
    Presentation Title: DIGITAL FABRICATION OF NANO-STRUCTURED METAL OXIDE COATINGS ON SILICA SAND-MICROSTRUCTURE AND THERMAL AND OPTICAL PROPERTIES

    Presentation Description: Solid particles are finding increased interest among researchers to use them as thermal energy storage materials and heat transfer fluids in particle receivers. Previously, researchers have investigated both commercially synthesized materials and natural particles for thermal storage applications. In contrast to synthesized materials, low-cost, earth-abundant natural materials suffer from low absorptivity and thermomechanical degradation. This study explores additive, digital manufacturing of engineered earth-abundant solid particles to improve their solar absorptivity.

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